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Question 14
In the following question, by using which mathematical operator will the expression become correct?
18 ? 6 ? 9 ? 27
Solution
Expression : 18 ? 6 ? 9 ? 27
(A) : x, ÷ and =
=> $$18\times6\div9=27$$
L.H.S. = $$2\times6=12\neq$$ R.H.S.
(B) : ÷, x and =
=> $$18\div6\times9=27$$
L.H.S. = $$3\times9=27=$$ R.H.S.
(C) : x, + and =
=> $$18\times6+9=27$$
L.H.S. = $$108+9=117\neq$$ R.H.S.
(D) : +, - and =
=> $$18+6-9=27$$
L.H.S. = $$24-9=15\neq$$ R.H.S.
=> Ans - (B)
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